{
  "metadata": {
    "title": "Example for groups"
  },
  
  "links": [
    {"rel": "self", "href": "http://example.com/grouped", "type": "application/opds+json"}
  ],
  
  "groups": [
    {
      "metadata": {"title": "Main Menu"},
      "navigation": [
        {"href": "/new", "title": "New Publications", "type": "application/opds+json", "rel": "http://opds-spec.org/sort/new"},
        {"href": "/popular", "title": "Popular Publications", "type": "application/opds+json", "rel": "http://opds-spec.org/sort/popular"}
      ]
    },
    {
      "metadata": {
        "title": "Featured Books",
        "numberOfItems": 20
      },
      "links": [
        {"rel": "self", "href": "/featured", "type": "application/opds+json"}
      ],
      "publications": [
        {
          "metadata": {
            "@type": "http://schema.org/Book",
            "title": "Moby-Dick",
            "author": "Herman Melville",
            "identifier": "urn:isbn:978031600000X",
            "language": "en",
            "modified": "2015-09-29T17:00:00Z"
          },
          "links": [
            {"rel": "self", "href": "http://example.org/manifest.json", "type": "application/webpub+json"}
          ],
          "images": [
            {"href": "http://example.org/cover.jpg", "type": "image/jpeg", "height": 1400, "width": 800},
            {"href": "http://example.org/cover-small.jpg", "type": "image/jpeg", "height": 700, "width": 400},
            {"href": "http://example.org/cover.svg", "type": "image/svg+xml"}
          ]
        }
      ]
    }
  ]
}
